JP5936266B2 - Car FRP cabin - Google Patents

Description

The present invention, FRP-made cabin, at least a kick-up portion erecting from the rear end of the front floor panel, from the upper end of the kick-up portion and a rear floor panel extending rearwardly, to support the fuel tank L-shaped The present invention relates to an FRP cabin for an automobile in which a fuel tank support bracket is fastened to a rear surface of the kick-up portion and a lower surface of the rear floor panel.

  A fuel tank is placed behind a vertical wall that rises diagonally rearward from the rear end of the front floor, and a cross member placed in the vehicle width direction below the fuel tank is crossed by the corner where the front floor and vertical wall intersect. Patent Document 1 below discloses a structure in which a tank support band is stretched over a portion and the lower surface of the fuel tank is supported by this tank support band.

  Also, a mounting bracket that supports the fuel tank on the FRP vehicle body is placed on the rear surface of the joint between the cross member and the rear partition of the vehicle body, and these three members are fastened together with rivets to increase the vehicle weight. Japanese Patent Application Laid-Open No. 2004-151867 discloses that the mounting bracket is firmly fixed without any problem.

Japanese Patent No. 4924166 JP 2010-64696 A

  By the way, when the FRP cabin of an automobile includes a kick-up portion that stands up from the rear end of the front floor panel and a rear floor panel that extends rearward from the upper end of the kick-up portion, an angle at which the kick-up portion and the rear floor panel intersect If a large load is input to the part, the part may be bent so that it is necessary to reinforce the corner part to increase the bending rigidity. However, since there is a problem that weight and cost increase when a corner portion where the kick-up portion and the rear floor panel intersect with each other using a special reinforcing member, it is possible to reinforce the corner portion using an existing member. desirable.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to reinforce a corner where an FRP cabin kick-up portion and a rear floor panel intersect while minimizing an increase in weight.

To achieve the above object, according to the first aspect of the present invention, the FRP cabin has at least a kick-up portion that stands up from the rear end of the front floor panel, and a rear end from the upper end of the kick-up portion. extending and a rear floor panel, a FRP made cabin for automobiles L-shaped fuel tank support bracket for supporting the fuel tank is fastened to the underside surface and the rear floor panel after the kick-up portion, the kick A first insert in which the up portion and the rear floor panel are configured by sandwiching a core material between an inner skin positioned on the vehicle interior side and an outer skin positioned on the vehicle exterior side, and the fuel tank support bracket is fastened with members are buried in the core material of the kick-up portion, the fuel tank supporting bracket fastening The second insert member is embedded in the core material of the rear floor panel, the first to the fuel tank supporting bracket of a motor vehicle, characterized in that the bracing portion connecting linearly between the second insert member is provided An FRP cabin is proposed.

According to the second aspect of the present invention, in addition to the configuration of the first aspect, the first screw hole of the fuel tank support bracket in a state of passing through the inner skin, the first insert member, and the outer skin. The inner skin is sandwiched between a head of a first bolt that is screwed to the first insert member, and the fuel tank is supported while passing through the inner skin, the second insert member, and the outer skin. An automobile FRP cabin is proposed, in which the inner skin is sandwiched between a head of a second bolt screwed into a second screw hole of the bracket and the second insert member .

According to the invention described in claim 3, in addition to the structure of claim 1 or 2, the fuel tank support bracket is arranged in the front-rear direction, and the core material of the kick-up portion and the rear floor panel An automobile FRP cabin is proposed in which the core material is formed of a corrugated plate having an uneven portion extending in the vehicle width direction.

  According to a fourth aspect of the present invention, in addition to the configuration of any one of the first to third aspects, the fuel tank support bracket includes a second portion facing the kick-up portion or the rear floor panel. An automobile FRP cabin having an I-shaped cross section comprising a flange, a second flange facing the fuel tank, and a web connecting the first and second flanges is proposed.

According to the invention described in claim 5, in addition to any one of claims 1 to 4, wherein the fuel tank is a fixed band whose both ends are fastened to the fuel tank support bracket An automobile FRP cabin is proposed which is fixed to the fuel tank support bracket.

With the arrangement of the 1, FRP made cabin includes at least a kick-up portion erecting from the rear end of the front floor panel and a rear floor panel extending rearwardly from the upper end of the kick-up portion, for supporting the fuel tank An L-shaped fuel tank support bracket is fastened to the rear surface of the kick-up portion and the lower surface of the rear floor panel. A first insert member in which the kick-up portion and the rear floor panel are configured by sandwiching a core material between an inner skin positioned on the vehicle interior side and an outer skin positioned on the vehicle exterior side, and the fuel tank support bracket is fastened together but are embedded in the core of the kick-up portion, since the second insert member having a fuel tank supporting bracket is fastened is embedded in the core material of the rear floor panel, the fuel tank support bracket first, second insert member It is fixed to the rear surface of the kick-up portion and the lower surface of the rear floor panel via

Even when a bending moment that bends the kick-up portion and the rear floor panel at the corner where they intersect, the fuel tank support bracket is provided with a bracing portion that linearly connects the first and second insert members . Therefore, the rigidity of the kick-up portion and the corner portion of the rear floor panel can be effectively increased by the fuel tank support bracket. Also, the fuel tank support bracket for supporting the fuel tank to the cabin is used to reinforce the kick-up and corners of the rear floor panel, eliminating the need for special reinforcing members and reducing the number of parts, weight and cost. it can, moreover since bracing section by cutting a part of the fuel tank supporting bracket obliquely is formed, it is possible to reduce the weight of the fuel tank supporting bracket.

According to the configuration of claim 2, the head of the first bolt screwed into the first screw hole of the fuel tank support bracket in a state of passing through the inner skin, the first insert member, and the outer skin, and the first insert member A second bolt head screwed into the second screw hole of the fuel tank support bracket in a state in which the inner skin is sandwiched between the inner skin, the second insert member and the outer skin, and the second insert member Since the inner skin is sandwiched between the first and second insert members, the inner skin around the first and second insert members can be reinforced to sufficiently increase the support strength of the fuel tank support bracket with respect to the kick-up portion and the rear floor panel. .

According to the third aspect, the fuel tank support bracket is arranged in the longitudinal direction, the core material and core material of the rear floor panel of the kick-up portion is composed of corrugated plate having irregularities extending in the vehicle width direction In addition, since the direction of the fuel tank support bracket and the direction of the corrugated portion of the corrugated plate are orthogonal, the fuel tank support bracket can be supported more firmly on the kick-up portion and the rear floor panel.

  According to a fourth aspect of the present invention, the fuel tank support bracket includes a first flange that faces the kick-up portion or the rear floor panel, a second flange that faces the fuel tank, and a web that connects the first and second flanges. Therefore, not only can the rigidity of the fuel tank support bracket bend and twist, but also the height of the fuel tank support bracket can be increased by changing the height of the web. It can be arbitrarily set, and the height of the lower surface of the fuel tank can be easily matched with the height of the lower surface of the front floor panel.

According to the fifth aspect, a fuel tank, because it is fixed to the fuel tank support bracket with fixing band whose both ends are fastened to the fuel tank support bracket, stable fuel tank to the fuel tank support bracket Can be supported.

The perspective view of the cabin made from CFRP of a car. FIG. 2 is a two-direction arrow view of FIG. 1. FIG. 3 is a three-direction arrow view of FIG. 1. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is an enlarged view of part 5 of FIG. 4. FIG. 6 is a sectional view taken along line 6-6 in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that the front-rear direction, the left-right direction (vehicle width direction), and the up-down direction in this specification are based on the driver seated in the driver's seat.

  As shown in FIG. 1, the body frame of an automobile is a cabin 11 formed in a bathtub shape with carbon fiber reinforced resin (CFRP), and a pair of left and right suspension support modules that are cast parts of an aluminum alloy connected to the front end of the cabin 11. 12, 12, a pair of left and right front side frame front parts 13, 13 made of an aluminum alloy extruded material that extends forward from the front ends of the suspension support modules 12, 12, and the front ends of the front side frame front parts 13, 13. A front end module 14 made of CFRP, a pair of left and right CFRP lower members 15, 15 extending from the left and right ends of the front end module 14, and a rear upper portion of the lower members 15, 15 extending rearward and upward. A pair of CFRP left and right connected to the front end Comprises a Pamenba 16, 16, the roll bar 17 made of CFRP erected on the upper rear surface of the cabin 11, a CFRP-made left and right pair of stays 18 and 18 for reinforcing supporting the roll bar 17 from the rear.

  The cabin 11 has a hollow structure in which an inner skin 19 and an outer skin 20 are joined up and down, a dash panel 21 at the front end, a pair of left and right side sills 22, 22 extending rearward from both ends of the dash panel 21 in the vehicle width direction, and a side sill 22. 22, a pair of left and right rear side frames 23, 23 extending rearward and upward from the rear end, a rear end cross member 24 connecting the rear ends of the rear side frames 23, 23 in the vehicle width direction, a dash panel 21 and left and right side sills 22 , 22, a kick-up portion 26 rising from the rear end of the front floor panel 25, and extending rearward from the upper end of the kick-up portion 26 to connect to the rear side frames 23, 23 and the rear end cross member 24. And a rear floor panel 27.

  The front end module 14 includes a bumper beam 28 extending in the vehicle width direction, and a pair of left and right bumper beam extensions that extend rearward from both ends of the bumper beam 28 in the vehicle width direction and are connected to the front ends of the front side frame front portions 13 and 13. 29 and 29 and a frame-shaped front bulkhead 30 supported between the bumper beam extensions 29 and 29. Each suspension support module 12 includes a front side frame rear portion 31 connected to the rear end of the front side frame front portion 13 and the front surface of the dash panel 21, and extends outward and upward in the vehicle width direction from the front side frame rear portion 31. A damper housing 32 connected to the front surface of the dash panel 21 is integrally provided. The left and right end portions of the dash panel 21 constitute a pair of left and right front pillar lower front portions 33 and 33 that rise upward from the front ends of the side sills 22 and 22. A pair of left and right metal front pillar lower rear portions 34 and 34 and a pair of left and right metal front pillar uppers 35 and 35 are connected to the rear surfaces of the front pillar lower front portions 33 and 33, and the left and right front pillar uppers 35 and 35 are connected to each other. The upper ends are connected by a metal front roof arch 36 extending in the vehicle width direction.

  The dash panel 21 includes an inclined wall 37 that extends obliquely upward from the front end of the front floor panel 25, and a vertical wall 38 that extends upward from the front end of the inclined wall 37. A floor tunnel 39 extending in the front-rear direction protrudes upward from the center in the vehicle width direction of the inner skin 19 and the outer skin 20 constituting the inclined wall 37 of the dash panel 21 and the upper and lower surfaces of the front floor panel 25. Further, a front cross member 40 and a rear cross member 41 that extend in the vehicle width direction intersecting the floor tunnel 39 bulge upward from the inner skin 19 constituting the upper surface of the front floor panel 25. On the other hand, in the rear floor panel 27, the inner skin 19 and the outer skin 20 are both formed flat.

  Fuel tank 100 is mounted so as to contact the rear surface of kick-up portion 26 and the lower surface of rear floor panel 27.

  As shown in FIGS. 1 to 3, the inner skin 19 and the outer skin 20 constituting the cabin 11 are arranged on the outer periphery of a dash panel 21, left and right side sills 22 and 22, left and right rear side frames 23 and 23, and a rear end cross member 24. Joint flanges 19a and 20a extending so as to surround are provided, and both the joint flanges 19a and 20a are joined by adhesion, welding, rivets or the like. On the bottom surface of the cabin 11, a recess 11 a (see FIG. 3) is formed which is surrounded on three sides by the rear surface of the kick-up portion 26 and the inner surfaces in the vehicle width direction of the left and right rear side frames 23, 23. The bottom surface of the fuel tank 100 that is supported so as to be fitted to 11a is aligned at substantially the same height as the bottom surface of the front cross member 40 (see FIG. 4). A pair of left and right fuel tank support brackets 101, 101 are fixed to the rear surface of the kick-up portion 26 and the lower surface of the rear floor panel 27 in the front-rear direction, and a pair of left and right fixing bands 102, 102 are attached to the fuel tank support brackets 101, 101. The fuel tank 100 is fixed via

  As shown in FIGS. 4 to 6, a cylindrical first metal insert member 103 is embedded in the core material 45 of the kick-up portion 26 in order to fasten each fuel tank support bracket 101. The Similarly, a pair of front and rear metal second insert members 104 and 104 formed in a cylindrical shape are embedded in the core material 46 of the rear floor panel 27. The first insert member 103 and the second insert members 104 and 104 are the same interchangeable members, and one surface thereof is bonded to the back surface of the inner skin 19 and the other surface is bonded to the back surface of the outer skin 20. .

  The fuel tank support bracket 101 formed in an L shape in a side view is a plate-like member die-cast with an aluminum alloy, and the cross section thereof is a first flange 101a with an upper edge and a front edge, and a rear edge and a lower edge The second flange 101b is I-shaped (see FIG. 6) connected by a web 101c. The first flange 101a and the second flange 101b are connected by a plurality of ribs 101d that divide the web 101c, and the web 101c that is surrounded by the first flange 101a, the second flange 101b, and the rib 101d. Is formed.

  The fuel tank support bracket 101 is rectilinearly separated from the kick-up portion 26 and the rear floor panel 27 by obliquely cutting a position facing the corner portion 105 (see FIG. 4) to which the kick-up portion 26 and the rear floor panel 27 are connected. A bracing portion 101f extending in a shape is provided. The front end of the bracing portion 101f is in contact with the rear surface of the kick-up portion 26 in the vicinity of the first insert member 103, and a first screw hole 101h facing the first insert member 103 is formed in the boss portion 101g formed there. The Further, the rear end of the bracing portion 101f is in contact with the lower surface of the rear floor panel 27 in the vicinity of the second insert member 104 on the front side, and a second screw hole 101j facing the second insert member 104 to the boss portion 101i formed there. , And a boss portion 101 i and a second screw hole 101 j facing the second insert member 104 on the rear side are also formed in the rear portion of the fuel tank support bracket 101.

  The first bolt 106 inserted from the passenger compartment side is inserted into the first screw hole 101h of the fuel tank support bracket 101 through the inner skin 19, the first insert member 103, and the outer skin 20, and the passenger compartment side. The two second bolts 107, 107 inserted through the inner skin 19, the second insert members 104, 104 and the outer skin 20 are passed through the two second screw holes 101 j, 101 j of the fuel tank support bracket 101. By screwing, the fuel tank 100 is supported by the pair of fuel tank support brackets 101, 101.

  A pair of front and rear contact plates 108, 108 formed in a plate shape with an elastic material such as rubber is fixed to the lower surface of the second flange portion 101 b of the fuel tank support bracket 101 facing the upper surface of the fuel tank 100 with bolts 109. The Further, third screw holes 101m and 101m are formed in a pair of front and rear boss portions 101k and 101k provided at the front end and the rear end of the fuel tank support bracket 101, and the fixed band 102 formed in a strip shape is attached to the fuel tank. The fuel tank 100 is fitted into the band groove 100a on the lower surface of 100, and the two bolts 110, 110 penetrating through the front and rear ends thereof are screwed into the third screw holes 101m, 101m, whereby the fuel tank 100 is paired with a fuel tank support bracket. 101 and 101 are supported.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  A corner 105 (see FIG. 4) between the kick-up portion 26 standing from the rear end of the front floor panel 25 of the cabin 11 and the rear floor panel 27 extending rearward from the upper end of the kick-up portion 26 is abruptly bent and stressed. Therefore, it is necessary to reinforce so that it will not bend even if a bending moment is input from the outside. According to the present embodiment, the front edge of each L-shaped fuel tank support bracket 101 is fastened to the rear wall of the kick-up portion 26 with the first bolt 106, and the upper edge is connected to the lower surface of the rear floor panel 27. Since the two bolts 107 and 107 are fastened, the kick-up portion 26 and the rear floor panel 27 sandwiching the corner portion 105 and the bracing portion 101f of the fuel tank support bracket 101 form a triangle, thereby kicking the corner portion 105 therebetween. The angle formed by the up portion 26 and the rear floor panel 27 is restricted by the bracing portion 101, and the bending of the corner portion 105 can be effectively suppressed.

  In particular, the vicinity of the front end of the bracing portion 101f is fixed to the strong first insert member 103 embedded in the core material 45 of the kick-up portion 26 with the first bolt 106, and the vicinity of the rear end of the bracing portion 101f is the core material of the rear floor panel 27. Since the second bolt 107 is fixed to the strong second insert member 104 embedded in 46, both ends of the bracing portion 101f can be firmly coupled to the kick-up portion 26 and the rear floor panel 27 to enhance the reinforcing effect. Further, since the fuel tank support brackets 101 and 101 for supporting the fuel tank 100 on the lower surface of the cabin 11 are used to reinforce the kick-up portion 26 and the corner portion 105 of the rear floor panel 27, no special reinforcing member is required. The number of parts, weight and cost can be reduced. In addition, since a portion of the fuel tank support bracket 101 is cut obliquely to form the bracing portion 101f, the weight of the fuel tank support bracket 101 can be reduced.

  Further, the first bolt 106 inserted from the vehicle interior side and penetrating through the inner skin 19, the first insert member 103 and the outer skin 20 is screwed into the first screw hole 101 h of the fuel tank support bracket 101, and the first bolt 106 An inner skin 19 is sandwiched between the head portion 106a and the first insert member 103, and the second bolt 107 is inserted from the vehicle interior side and penetrates the inner skin 19, the second insert members 104 and 104, and the outer skin 20. , 107 are screwed into the second screw holes 101j, 101j of the fuel tank support bracket 101, and the inner skin 20 is sandwiched between the heads 107a, 107a of the second bolts 107, 107 and the second insert members 104, 104. (See FIGS. 4 and 5), the first and second insert members 103, 104, 1 Support strength of the fuel tank support bracket 101 can be sufficiently enhanced 4 to reinforce the inner skin 19 around for kick-up portion 26 and the rear floor panel 27.

  Further, the fuel tank support bracket 101 is arranged in the front-rear direction, and the core material 45 of the kick-up portion 26 and the core material 46 of the rear floor panel 27 are configured by corrugated plates having uneven portions 45a... 46a. (See FIG. 2), the direction of the fuel tank support bracket 101 and the direction of the corrugated portions 45a..., 46a. Can be supported.

  The fuel tank support bracket 101 includes a first flange 101a that faces the kick-up portion 26 and the rear floor panel 27, a second flange 101b that faces the fuel tank 100, and a web that connects the first and second flanges 101a and 101b. Since it has an I-shaped cross section composed of 101c (see FIG. 6), not only can the rigidity against bending and twisting of the fuel tank support bracket 101 be sufficiently increased, but also the height of the web 101c can be changed. The height of the fuel tank support bracket 101 is arbitrarily set, and the height of the lower surface of the fuel tank 100 can be easily matched with the height of the lower surface of the front floor panel 25 (see FIG. 4).

  Further, since the fuel tank 100 is fixed to the fuel tank support brackets 101 and 101 by the fixing bands 102 and 102 fastened to the fuel tank support brackets 101 and 101 at both ends (see FIG. 4), the fuel tank 100 is fixed to the fuel tank support bracket. 101 and 101 can be supported stably.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the cabin 11 and the like are made of CFRP, but may be made of FRP (fiber reinforced resin) using fibers other than carbon fibers.

11 cabin 19 inner skin 20 outer skin 25 front floor panel 26 kick-up portion 27 rear floor panel 45 core material 45a uneven portion 46 core material 46a uneven portion 100 fuel tank 101 fuel tank support bracket 101a first flange 101b second flange 101c web 101f Bracing section 101h First screw hole 101j Second screw hole 102 Fixing band 103 First insert member 104 Second insert member 106 First bolt 106a Head 107 Second bolt 107a Head

Claims (5)

The FRP cabin (11) includes at least a kick-up portion (26) standing up from the rear end of the front floor panel (25), and a rear floor panel (27) extending rearward from the upper end of the kick-up portion (26). wherein, FRP made for a motor vehicle L-shaped fuel tank support bracket for supporting the fuel tank (100) (101) is fastened to the lower surface of the rear surface and the rear floor panel (27) of the kick-up portion (26) A cabin,
The kick-up portion (26) and said rear floor panel (27), a core material between the outer skins (20) located in the vehicle exterior side and an inner skin (19) located in the passenger compartment side (45, 46) It is constructed by sandwiching the said a fuel tank support bracket first insert member (103) to (101) is fastened is embedded in the core material (45) of the kick-up portion (26), the fuel tank support It is embedded in the bracket the second insert member (101) is fastened (104) core material of the rear floor panel (27) (46), the fuel tank supporting bracket of the first to (101), a second insert member ( 103, 104) is provided with a bracing portion (101f) that linearly connects the FRP cabin of an automobile. A first bolt screwed into the first screw hole (101h) of the fuel tank support bracket (101) in a state of passing through the inner skin (19), the first insert member (103) and the outer skin (20). The inner skin (19) is sandwiched between the head (106a) of the (106) and the first insert member (103), and the inner skin (19), the second insert member (104), and the A head portion (107a) of a second bolt (107) screwed into a second screw hole (101j) of the fuel tank support bracket (101) in a state of passing through the outer skin (20), and the second insert member ( 104. The FRP cabin of the automobile according to claim 1 , wherein the inner skin (19) is sandwiched between the inner skin (19) and the vehicle. The fuel tank supporting bracket (101) is disposed in the longitudinal direction, the kick-up portion the core material (26) (45) and said core member (46) is uneven portion extending in the vehicle width direction of the rear floor panel (27) ( The FRP cabin of an automobile according to claim 1 or 2, characterized in that it is constituted by a corrugated plate having 45a, 46a).   The fuel tank support bracket (101) includes a first flange (101a) facing the kick-up portion (26) or the rear floor panel (27), and a second flange (101b) facing the fuel tank (100). And an I-shaped cross section comprising a web (101c) connecting the first and second flanges (101a, 101b). FRP cabin of an automobile. The fuel tank (100) is characterized in that both ends are fixed to the fuel tank support bracket (101) in engagement on securing band (102) to the fuel tank supporting bracket (101), according to claim 1 The FRP cabin of the automobile according to any one of claims 4 to 5.

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